Functional impairment of PRRSV-specific peripheral CD3+CD8 cells Sarah Costers, David J. Lefebvre, Bruno Goddeeris, Peter L. Delputte and Hans J. Nauwynck Vet. Res., 40 5 (2009) 46 Published online: 16 May 2009 DOI: 10.1051/vetres/2009029